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Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu))

文献类型:期刊论文

AuthorAaij, R.42; Adeva, B.41; Adinolfi, M.50; Ajaltouni, Z.5; Akar, S.61; Albrecht, J.10; Alessio, F.42; Alexander, M.55; Alfonso Albero, A.40,49; Ali, S.45
SourcePhysical review letters
Issued Date2018-03-23
Volume120Issue:12Pages:10
ISSN0031-9007
DOI10.1103/physrevlett.120.121801
Corresponding AuthorAaij, r.()
English AbstractA measurement is reported of the ratio of branching fractions r(j/psi) = b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu)), where the tau(+) lepton is identified in the decay mode tthorn tau(+) -> mu(+)nu(mu)(nu) over bar (tau). this analysis uses a sample of proton-proton collision data corresponding to 3.0 fb(-1) of integrated luminosity recorded with the lhcb experiment at center-of-mass energies of 7 and 8 tev. a signal is found for the decay b-c(+) -> j/psi tau(+)nu(tau) at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be r(j/psi) = 0.71 +/- 0.17(stat) +/- 0.18(syst). this result lies within 2 standard deviations above the range of central values currently predicted by the standard model.
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Language英语
WOS IDWOS:000428167200007
PublisherAMER PHYSICAL SOC
URIhttp://www.irgrid.ac.cn/handle/1471x/2178200
Collection高能物理研究所
Corresponding AuthorAaij, R.
Affiliation1.CBPF, Rio De Janeiro, Brazil
2.Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil
3.Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China
4.Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, Annecy Le Vieux, France
5.Clermont Univ, Univ Blaise Pascal, CNRS, IN2P3, Clermont Ferrand, France
6.Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France
7.Univ Paris Saclay, CNRS, IN2P3, Univ Paris Sud,LAL, Orsay, France
8.Univ Paris Diderot, Univ Pierre & Marie Curie, CNRS IN2P3, LPNHE, Paris, France
9.Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
10.Tech Univ Dortmund, Fak Phys, Dortmund, Germany
Recommended Citation
GB/T 7714
Aaij, R.,Adeva, B.,Adinolfi, M.,et al. Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu))[J]. Physical review letters,2018,120(12):10.
APA Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2018).Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu)).Physical review letters,120(12),10.
MLA Aaij, R.,et al."Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu))".Physical review letters 120.12(2018):10.

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